Coexistence of Fermi arcs with two-dimensional gapless Dirac states
We present a physical scenario in which both Fermi arcs and two-dimensional gapless Dirac states coexist as boundary modes at the same two-dimensional surface. This situation is realized in topological insulator–Weyl semimetal interfaces in spite of explicit time-reversal symmetry breaking. Based on...
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| Format: | Article |
| Language: | English |
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American Physical Society
2015
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| Online Access: | http://hdl.handle.net/1721.1/96150 https://orcid.org/0000-0002-0543-6298 |
| _version_ | 1826208614008750080 |
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| author | Grushin, Adolfo G. Venderbos, Jorn W. F. Bardarson, Jens H. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Grushin, Adolfo G. Venderbos, Jorn W. F. Bardarson, Jens H. |
| author_sort | Grushin, Adolfo G. |
| collection | MIT |
| description | We present a physical scenario in which both Fermi arcs and two-dimensional gapless Dirac states coexist as boundary modes at the same two-dimensional surface. This situation is realized in topological insulator–Weyl semimetal interfaces in spite of explicit time-reversal symmetry breaking. Based on a heuristic topological index, we predict that the coexistence is allowed when (i) the corresponding states of the Weyl semimetal and topological insulator occur at disconnected parts of the Brillouin zone separated by the Weyl nodes and (ii) the time-reversal breaking vector defining the Weyl semimetal has no projection parallel to the domain wall. This is corroborated by a numerical simulation of a tight binding model. We further calculate the optical conductivity of the coexisting interface states, which can be used to identify them through interference experiments. |
| first_indexed | 2024-09-23T14:08:24Z |
| format | Article |
| id | mit-1721.1/96150 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:08:24Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/961502022-09-28T18:47:19Z Coexistence of Fermi arcs with two-dimensional gapless Dirac states Grushin, Adolfo G. Venderbos, Jorn W. F. Bardarson, Jens H. Massachusetts Institute of Technology. Department of Physics Venderbos, Jorn W. F. We present a physical scenario in which both Fermi arcs and two-dimensional gapless Dirac states coexist as boundary modes at the same two-dimensional surface. This situation is realized in topological insulator–Weyl semimetal interfaces in spite of explicit time-reversal symmetry breaking. Based on a heuristic topological index, we predict that the coexistence is allowed when (i) the corresponding states of the Weyl semimetal and topological insulator occur at disconnected parts of the Brillouin zone separated by the Weyl nodes and (ii) the time-reversal breaking vector defining the Weyl semimetal has no projection parallel to the domain wall. This is corroborated by a numerical simulation of a tight binding model. We further calculate the optical conductivity of the coexisting interface states, which can be used to identify them through interference experiments. 2015-03-24T17:06:01Z 2015-03-24T17:06:01Z 2015-03 2015-02 2015-03-16T22:00:06Z Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/96150 Grushin, Adolfo G., Jorn W. F. Venderbos, and Jens H. Bardarson. “Coexistence of Fermi Arcs with Two-Dimensional Gapless Dirac States.” Phys. Rev. B 91, no. 12 (March 2015). © 2015 American Physical Society https://orcid.org/0000-0002-0543-6298 en http://dx.doi.org/10.1103/PhysRevB.91.121109 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Grushin, Adolfo G. Venderbos, Jorn W. F. Bardarson, Jens H. Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title | Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title_full | Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title_fullStr | Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title_full_unstemmed | Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title_short | Coexistence of Fermi arcs with two-dimensional gapless Dirac states |
| title_sort | coexistence of fermi arcs with two dimensional gapless dirac states |
| url | http://hdl.handle.net/1721.1/96150 https://orcid.org/0000-0002-0543-6298 |
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